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ARTICLE
Estimating equibiaxial stress-strain relation based on non-homogeneous biaxial measurement
1
Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary
Submission date: 2024-12-03
Acceptance date: 2025-02-11
Online publication date: 2025-05-17
Corresponding author
Attila Kossa
Department of Applied Mechanics, Budapest University of Technology and Economics, Muegyetem rkp. 3., 1111, Budapest, Hungary
Department of Applied Mechanics, Budapest University of Technology and Economics, Muegyetem rkp. 3., 1111, Budapest, Hungary
KEYWORDS
equibiaxial testinghyperelastic materialsspecimen geometryfinite element analysisstress-strain relationship
TOPICS
solid mechanicsmechanics of materialscomputational mechanicsexperimental mechanicsmechanics of continuaclassical mechanics
ABSTRACT
This study investigates the influence of geometry on stress distributions in equibiaxial testing of rubber-like materials using hyperelastic models. Two geometries were examined, characterized by parameters specifying configurations like corner angles and normalized radii. A finite element approach was employed to simulate deformation under equibiaxial stretching, revealing non-homogeneous stress states. Apparent stress ratios were derived to evaluate geometry-induced deviations from purely equibiaxial stress-strain behavior. Results highlight the significance of geometrical factors in stress distributions. The findings offer insights for optimizing specimen designs for equibiaxial material characterization and improving the accuracy of extracted material properties.
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| eISSN: | 2543-6309 |
| ISSN: | 1429-2955 |
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